Noun
canvasback; redhead; pochard; etc.
Source: WordNetWhen the moor is flooded it can be occupied by large numbers of wildfowl; up to 22,000 wigeon (Anas penelope), 250 Bewick's swan (Cygnus bewickii) and good numbers of pochard (Aythya ferina), teal (Anas crecca) and tufted duck (Aythya fuligula). Source: Internet